Businesses in Tijuana, Mexico, have asked the government to change the new 666 area code to be assigned to the city.
They fear it could give the violence-plagued area a bad reputation.
The number 666 is associated with Satan in the Bible and was made famous by The Omen films.
Tijuana's National Chamber of Commerce said: "This will give our city a bad image".
He added that Tijuana, across the border from San Diego, California, had already suffered from "out-of-control situations and tragedies that happen to occur here".